Simultaneous Nadir Overpasses (SNOs) between AURA and NPP
TLE Epoch: 2017 4 11.  Predictions up to the next  14.0 days:

     Date     Time(AURA) AURA Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/12/2017   03:41:42   ( -79.47,-158.91) 04/12/2017   03:41:16  ( -79.47,-158.77)    2.94                26
 04/12/2017   04:31:04   (  79.61,   9.76) 04/12/2017   04:31:56  (  79.61,   9.70)    1.17                52
 04/14/2017   19:09:59   (  76.10, 133.98) 04/14/2017   19:08:46  (  76.28, 132.78)   37.44                73
 04/14/2017   19:58:09   ( -79.51, -42.76) 04/14/2017   19:58:11  ( -79.51, -42.73)    0.71                 2
 04/17/2017   11:25:13   (  79.34, -95.64) 04/17/2017   11:24:25  (  79.35, -95.54)    2.13                48
 04/17/2017   12:14:35   ( -79.54,  73.35) 04/17/2017   12:15:05  ( -79.54,  73.31)    0.83                30
 04/20/2017   03:41:38   (  79.45,  20.94) 04/20/2017   03:41:18  (  79.45,  21.01)    1.41                20
 04/20/2017   04:31:00   ( -79.64,-170.04) 04/20/2017   04:31:58  ( -79.64,-170.10)    1.55                58
 04/22/2017   19:08:46   ( -79.21, -32.39) 04/22/2017   19:07:37  ( -79.20, -32.43)    1.00                69
 04/22/2017   19:58:04   (  79.50, 137.23) 04/22/2017   19:58:12  (  79.51, 137.29)    1.45                 8
 04/25/2017   11:25:10   ( -79.34,  84.36) 04/25/2017   11:24:29  ( -79.34,  84.35)    0.44                41